Research
Hormonal
Low leptin levels during weight loss increase brain activity in regions involved in emotional, cognitive, and sensory control of food intake, driving the desire to eat.
When you lose weight, your brain changes how it processes food images, making them more appealing and triggering decision-making areas associated with craving. This is a biological response to low leptin, not just a failure of willpower.
GoodSupportsHIGH confidence
Leptin levels fell during weight loss and increased brain activity in areas involved in emotional, cognitive, and sensory control of food intake.
Why this rating
Based on fMRI studies in humans (Rosenbaum et al., Farooqi et al.).
Source
Revisiting leptin’s role in obesity and weight loss
Rexford S. Ahima · Journal of Clinical Investigation · 2008
DOI 10.1172/jci36284
narrative_reviewCited 197×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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